Chair



FIG. 1 is a front perspective view of a chair showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a side view, the opposite side being a mirror image thereof; and,

FIG. 4 is a top view thereof.

The dotted lines showing the chair back and seat are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a chair, as shown and described. 